add support for OTLP logging/tracing (#599)

- adds `zentelemetry` project which houses new functionality for serializing logs and traces in OpenTelemetry Protocol format (OTLP)
- moved existing stats functionality from `zencore` to `zentelemetry`
- adds `TRefCounted<T>` for vtable-less refcounting
- adds `MemoryArena` class which allows for linear allocation of memory from chunks
- adds `protozero` which is used to encode OTLP protobuf messages

1 files changed, 19 insertions, 0 deletions

diff --git a/src/zentelemetry/zentelemetry.cpp b/src/zentelemetry/zentelemetry.cpp
new file mode 100644
index 000000000..ed6ad13b9
--- /dev/null
+++ b/src/zentelemetry/zentelemetry.cpp
@@ -0,0 +1,19 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#include "zentelemetry/zentelemetry.h"
+
+#include "zentelemetry/otlptrace.h"
+#include "zentelemetry/stats.h"
+
+namespace zen {
+
+void
+zentelemetry_forcelinktests()
+{
+	zen::stats_forcelink();
+#if ZEN_WITH_OTEL
+	zen::otel::otlptrace_forcelink();
+#endif
+}
+
+}  // namespace zen